<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>文件上传</title>
	<style>
	html,body{padding: 0;margin: 0;overflow: hidden;background-color: green;}
	#img{width: 200px; height: 200px;}
	</style>
</head>
<body>
	<form action="" method="post" enctype="multipart/form-data">
		<input type="file" name="img" id="upload" multiple="multiple" accept="image/gif">
	</form>
</body>
</html>